Pull-trough resistance of tensile-loaded screw-fastenings of thin-walled sheeting and sandwich panels

Fixings of different thin-walled building components differ in load-bearing behaviour and load-bearing capacity, even if identical screw fasteners are used. This is most pronounced for fixings under tensile loading. In this case, the differences are caused by the differences in geometry and material properties of the thin-walled building components, leading to differences in local deformation behaviour and therefore local stressing. We discuss the influence of parameters such as geometry and material on load-bearing behaviour and pull-trough resistance of fixings with screw fasteners. A comparison between the different thin-walled building components is made, also focusing on the difference between sheeting made of steel and made of aluminium. The conclusions of this discussion have to be taken into account when designing test set-ups for the determination of the characteristic resistance values of such connections. A short review of the new ECCS-Recommendations dealing with testing of fixings is done.
For thin-walled trapezoidal sheeting and corrugated sheeting design equations can be obtained by evaluating a huge number of test results. ... mehrThese equations are presented and compared with theequations in design codes. For sandwich panels, a equation allowing analysing the influence of material and geometrical parameters on the load-bearing resistance is presented.